Nexperia USA Inc. 74HCT157PW-Q100,11

Overview

74HCT157PW-Q100 from Nexperia is an automotive-qualified quad 2-input multiplexer with TTL-compatible inputs, 16-pin TSSOP package, -40 °C to +125 °C operating range, and enable-controlled output gating. It routes four independent data pairs (1I0/1I1 through 4I0/4I1) to corresponding non-inverting outputs (1Y–4Y) based on a shared select (S) and active-low enable (E) signal-used in vehicle body control modules for signal consolidation and mode selection logic.

For engineers reviewing the 74HCT157PW-Q100 datasheet, 74HCT157PW-Q100 pinout, 74HCT157PW-Q100 application, or 74HCT157PW-Q100 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 4.5 V–5.5 V supply compatibility, propagation delay ≤41 ns at 4.5 V, input clamp diodes enabling overvoltage-tolerant interfacing, and TSSOP16 footprint suitability for space-constrained automotive PCBs.

Technical Context

This device implements four independent 2:1 multiplexers sharing one common select (S) and one active-low enable (E) control line. Each channel passes either the I0 or I1 input to its Y output based on S state, while E forces all outputs LOW when HIGH-enabling synchronized channel disable across all four paths.

Input thresholds are TTL-compatible (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), ensuring direct interfacing with legacy microcontrollers and logic families. Output drive strength is ±4 mA at VCC = 4.5 V, with VOH ≥ 3.98 V and VOL ≤ 0.26 V under load, supporting robust noise margins in electrically noisy automotive environments.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1): plastic thin shrink small outline, 16 leads, 4.4 mm body width, 0.65 mm lead pitch, exposed pad not present-designed for AOI-compatible reflow assembly in automotive production.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input multiplexer applications.

Compared with 74HC157PW-Q100, the 74HCT157PW-Q100 offers guaranteed TTL-level input recognition critical for legacy 5 V MCU interfaces, while SN74LV157APWRE4 trades automotive qualification for lower voltage operation-making the HCT variant the sole choice for production automotive ECUs requiring drop-in reliability.

Availability

74HCT157PW-Q100 is available at Aetrix Electronics and suitable for automotive body control, instrument cluster, ADAS camera sequencing, and electric power steering diagnostic systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74HCT157PW-Q100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a leading semiconductor manufacturer specializing in high-performance, high-reliability logic, analog, and discrete components, with core expertise in automotive-qualified solutions.

The 74HCT157-Q100 belongs to Nexperia's automotive logic portfolio, designed specifically to replace legacy 74-series multiplexers in safety-critical vehicle subsystems while meeting AEC-Q100 Grade 1 requirements.

FAQ

What is the maximum clock/data frequency supported by the 74HCT157PW-Q100?

The device does not operate on a clock; it is combinational logic. Maximum usable data rate depends on propagation delay and system timing margins. At VCC = 4.5 V, tpd(S→Y) is 37 ns max, supporting input signal transitions up to ~13.5 MHz assuming 50% duty cycle and sufficient setup/hold time-verified in automotive infotainment switch matrix applications.

Can the 74HCT157PW-Q100 be used with a 3.3 V supply?

No. The 74HCT157PW-Q100 is specified only for 4.5 V to 5.5 V operation per its recommended conditions. At 3.3 V, VIH threshold (2.0 V min) may not be reliably met, and output drive strength degrades significantly-use 74LVC157 or 74AUP1G157 for true 3.3 V compatibility.

Is the TSSOP16 package RoHS and REACH compliant?

Yes. The 74HCT157PW-Q100 in SOT403-1 (TSSOP16) packaging complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, including exemption 7a for lead in high-melting-temperature type solders-confirmed in Nexperia's official compliance documentation dated May 2024.

Does the enable (E) pin support partial power-down of unused channels?

No. E is a global enable: when HIGH, all four outputs (1Y–4Y) are forced LOW simultaneously-there is no per-channel enable. To isolate individual channels, external gating or separate multiplexers are required; E serves only as a system-level output disable for power or fault containment.